<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>表格练习</title>
</head>
<body>

<table border="1px">
  <caption>讲师信息表</caption>
  <tr>
    <th>序号</th>
    <th>姓名</th>
    <th>科目</th>
  </tr>
  <tr>
    <td>1</td>
    <td>超超超超超超超超</td>
    <td>框架</td>
  </tr>
  <tr>
    <td>2</td>
    <td>硕博</td>
    <td>SRE</td>
  </tr>
</table>

<hr>

<table border="1px">
  <tr>
    <td>1-1</td>
    <td>1-2</td>
    <td>1-2</td>
    <td>1-4</td>
  </tr>
  <tr>
    <td colspan="2">2-1</td>
<!--    <td>2-2</td>-->
    <td>2-3</td>
    <td rowspan="3">2-4</td>
  </tr>
  <tr>
    <td>3-1</td>
    <td>3-2</td>
    <td>3-3</td>
<!--    <td>3-4</td>-->
  </tr>
  <tr>
    <td>4-1</td>
    <td>4-2</td>
    <td>4-3</td>
<!--    <td>4-4</td>-->
  </tr>
</table>

<hr>

<table border="1px" style="border-collapse: collapse">
  <caption>购物车</caption>
  <tr>
    <th>商品编号</th>
    <th>商品名称</th>
    <th>商品价格</th>
  </tr>
  <tr>
    <td>1</td>
    <td>小米Air</td>
    <td>5877</td>
  </tr>
  <tr>
    <td>2</td>
    <td>华为遥遥遥遥领先</td>
    <td>8877</td>
  </tr>
  <tr>
    <td>总价:</td>
    <td colspan="2">10000</td>
  </tr>
</table>

</body>
</html>